- CCH, Inc. - Offers articles on handling tax obligations.
- Internal Revenue Service - Provides tax information and forms for U.S. businesses.
- Nolo - Business tax legal issues explained for LLCs, corporations, sole proprietorships.
- Tax Professionals Directory - Find a Tax Professional in the U.S. or Canada.
- SBA Office of Advocacy - Provides information on taxes and legal issues for small businesses.
- Business Know-how - Business Know-how's IRS Resources for Small Business
- Enrolled Agents Directory - Enrolled Agents and Tax Experts and handle tax problems and IRS Issues.
- Payrollrightnow.com - Payroll tax compliance.
- TaxAlmanac.org - Wiki-platform tax resource, primarily for tax-preparation and accounting professionals.
- 1040.com - Tax forms, IRS links, news, and answers to your questions.
- Nolo Press' Small Business Tax FAQ - Answers to common tax questions on tax deductions for small businesses.
- The Tax Foundation - Non-partisan organization that educates Americans about sound tax policies.
- Online Payroll Guide - Guide to US payroll tax laws.
- TMF-VAT - Has information on international tax (VAT and IPF). You can also check tax rates in different countries, their respective names, etc.
- Tax Administrators - Tax Rates for all 50 States from the Federation of Tax Administrators.
- State Tax and Revenue Departments